U.S. Air Force Senior Airmen Zackary Aldag, 145th Aircraft Maintenance Squadron, walks to the front of a C-17 Globemaster III at the North Carolina Air National Guard Base, Charlotte Douglas International Airport, July 24, 2018. Aldag is in upgrade training for C-17 Globemaster III aircraft after the units conversion from the C-130 Hercules aircraft and is working towards being fully qualified.